Current Mode Boost Converter

467

06:56:53

10V to 15V boost at 1A.

A Current Mode Boost Converter uses the ramp signal generated by the inductor current to create a PWM signal to control the switching MOSFET, unlike the conventional circuits that use a seperate ramp oscillator. Although this is less intuitive, switch current sensing and limiting is inherently done and a seperate current limiting circuit is not needed.
NMOS: IRF540N
https://www.maximintegrated.com/en/design/technical-documents/tutorials/2/2031.html

published 3 years ago

ROCKETBUSTER

3 years ago

Excellent

KSullivan20221

3 years ago

Awesome! Can I ask why you used a diode in the error amplifier for the voltage instead of a capacitor?

PrathikP

3 years ago

The diode is not for any "voltage". The diode simple keeps the op amp in its closed loop mode and also limits the error voltage to 0.8V. Keeping it in its closed loop mode has the benifit that it reacts faster, compared to leaving it in its open loop mode, in which case it would take time for it to return to the closed loop mode. It results in an overshoot, like you can see in my buck converter project.

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